Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MARGARET MARIE THORSEN MD
NPI 1366001836
Obstetrics & Gynecology - Maternal & Fetal Medicine in Providence, RI

Q: What is Margaret Thorsen's NPI number?

The NPI number for Margaret Thorsen is 1366001836. It was assigned to this individual provider in the NPPES registry on June 10, 2019.

Q: What is Margaret Thorsen's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Q: When was this NPI record last updated?

The NPPES record for Margaret Thorsen was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 53 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 10, 2019PECOS Enrolled

101 PLAIN ST FL 6, PROVIDENCE, RI 02903(401) 274-1122(401) 453-7622 Get Directions Write a Review

NPPES record last updated: September 21, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Sep 21, 2026, Aug 12, 2026, Mar 28, 2023 and 1 more (4 updates tracked since 2019).

On this page

About Dr. Margaret Marie Thorsen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARGARET MARIE THORSEN MD (NPI 1366001836) is an individual maternal & fetal medicine provider in Providence, Rhode Island, licensed in Rhode Island (MD19402) and active in the NPI registry since June 2019. She is enrolled in Medicare PECOS and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1366001836

Entity TypeIndividualFemale

Primary Taxonomy207VM0101X

Provider Legal NameDR. MARGARET MARIE THORSENCredential: MD

Location Address101 PLAIN ST FL 6Providence, RI 02903-4829

Mailing Address455 Toll Gate Rd, Prc And CredentialingWarwick, RI 02886-2759 · (401) 273-0641 · Fax (401) 273-2919

Phone(401) 274-1122

Fax(401) 453-7622

Sole ProprietorNo

Enumeration DateJune 10, 2019

Last NPPES UpdateSeptember 21, 20264 updates tracked since enumeration

NPPES CertifiedSeptember 21, 2026

✔ NPI 1366001836 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207VM0101X

License✔ Licensed in RI · MD19402

Definition

An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.

101 PLAIN ST FL 6, Providence, RI 02903

Open in Google Maps ↗

Secondary Practice Locations 3

Location 12 Dudley St Ste 580Providence, RI 02905-3244 · Phone (401) 274-1122 · Fax (401) 453-7684

Location 2101 Dudley StProvidence, RI 02905-2499 · Phone (401) 274-1122 · Fax (401) 453-7622

Location 390 Plain StProvidence, RI 02903-4817 · Phone (401) 274-1122 ext. 47457 · Fax (401) 277-3694

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Margaret Marie Thorsen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Margaret Thorsen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Affinity Physicians LLC

0.2 mi

Anesthesiology

101 DUDLEY STREET, WIH DEPT OF ANESTHESIOLOGY
Providence, RI 02905

Reassigned Medicare billing, Rhode Island enrollment
984 clinicians in this Medicare group

NPI 1053038471 (401) 274-1122

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02903 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$134.17 typical visit price

range $58.57 – $177.03

Typical copayment $33.54 (range $14.64 – $44.25)

Most-billed visit code 99204

Established Patient

$72.93 typical visit price

range $18.92 – $144.38

Typical copayment $18.23 (range $4.73 – $36.09)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. CHRISTINA STANG LICSW

Social Worker (Clinical)